초록 ▼

A packetized trellis coder and method is disclosed for providing error correction coding of IEEE 802.3 frame formatted Ethernet packets for transmission at one gigabit per second (Gbps) over twisted-pair wiring has been disclosed. The error correction code protects each byte of the ethernet frame wi

A packetized trellis coder and method is disclosed for providing error correction coding of IEEE 802.3 frame formatted Ethernet packets for transmission at one gigabit per second (Gbps) over twisted-pair wiring has been disclosed. The error correction code protects each byte of the ethernet frame with a parity bit constructed using a convolutional encoder such that a maximum likelihood sequence estimation at the receiver using a Viterbi decoder will result in a significant receiver performance gain. At the end of the Ethernet packet, the trellis coder restores the states of the convolutional encoder to a known value (state 0) before beginning Idle transmission so that the Viterbi decoder at the receiver can read off the end-of-packet symbols without any performance penalty. The mapping and the inverse mapping from raw data bits to symbols and vice-versa can be implemented with simple gates due to algorithmic symbol mapping of a 4-D trellis code via 1-D partitioning. The same redundancy that is needed for control code transmission in Ethernet frames is used to achieve the trellis coding and to improve receiver performance.

대표청구항 ▼

[ What is claimed is:] [1.] A method of transmitting data from a transmitter to a receiver over a communication channel, comprising the steps of:setting a convolutional encoder for generating a parity bit to a known state at the start and end of each data packet;receiving an input data word of a dat

[ What is claimed is:] [1.] A method of transmitting data from a transmitter to a receiver over a communication channel, comprising the steps of:setting a convolutional encoder for generating a parity bit to a known state at the start and end of each data packet;receiving an input data word of a data packet, the input word having a set of most significant bits and a set of least significant bits;mapping the data word and the parity bit generated by the convolutional encoder over wire-pairs using a multi-level code;using the parity bit and the set of least significant bits to select one of a plurality of subsets of encoded points; andusing the set of most significant bits to select one of a plurality of points within the selected subset of encoded points.